Refrigerator-machine



W. YOUNG. REFRIGERATOR MACHINE. APPLICATION FILED 0014,1911.

Patented Feb. 10, 1920.

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awuewtoz WILLIAM YOUNG, OF TAdOMA, WASHINGTON.

REFRIGERATOR- MACHINE.

Specification of Letters Patent.

Patented Feb. to, 1920.

' Application filed October 4, 1917. Serial No. 194,643.-

To all whom it may concern: 7

Be it known that I, ,WILLIAM YOUNG, a citizen of the United States,residing at the city of Tacoma, in the county of Pierce and State ofWashington, have invented new and useful Improvements in Refrigerator-Machines, of which the following is a specification.

My invention relates to improvements in refrigerator machines in whichammonia gas is put under pressure, and from'which ammonia liquid isderived and distributed to expansion coils for refrigerating purposes.

The objects of my invention are, first, to provide a safety valveby-pass between the high and low pressures within the cylinder of thecompressor, and thus automatically control the pressure within thecondenser tank;-second, to provide a by-pas's between the crank case andcylinder of the compressor whereby the piston will be lubricated and thevalves sealed automatically; and,

' third, to construct a small refrigerator mamechanism shown in theaccompanyingchine suitable for residences and small restaurants as wellas for larger establishments. I attain these objects by means of thedrawing exhibited in one figure and described withreference to thenumerals thereon.

My improved refrigerator machine corn Y prises a compressor having acylinder 1. in

which is operated a piston 2, by the crank 3 which is driven by anelectric or other motor power operating the belt 4 on the wheel 5..

The compressor machine is oper. d in conjunctionewith a condenser tankin which are new improvements describedunder a separatepatentapplication. The required amount of liquid ammonia is put into thecondenser-tank 6 with the expansion coils .in vacuum. Gas of ammonia isthen compressed into the condenser tank 6 till the re-' .quired pressureis obtained to fill theexpansion'coils with ammonia fgas, after whichthe compressor machlne w1ll work automat1cally.

In the automatic refrigerating process ofv the machine, the ammoniapasses from the condenser tank 6 throughthe'outlet pipe 7 from whichit'is sprayed into gas and intothe'expansion coils of the refrigeratingsystern. The return from the expansion coils is received into thecompressor cylinder 1 through the inlet pipe 8 whence it is again forcedinto the condenser tank 6 through the denser tank 6, after which it willcontinue to circulate through the condenser tank and till the pressureis lowered within the conthe expansion coils system. By means of thisspring actuated by-pass valve 11, it will be seen that a uniformpressure is kept within the'tank 6 at all times and all danger ofexplosion is prevented without the care of an operator.

The case 13 in which the crank 3 revolves is designed to be filled withoil to a height above thecrank shaft 14 to lubricate the .bearings 'andto prevent the escape o'f gas around the crank shaft. The action of thecrank so agitates the .oil. that a spray is formed thereby. A by-pass 15in the side of the compressor cylinder allowstheOil spray to be, forcedinto the cylinder 1' above to lub-ricate thepiston 2 and; seal thecompressor valves. It will be observed this by-pass port opens into thecylinder l'just above the piston head when it is at the lowest point anda pressure is thus formed withinthe crank 7 case 13., This pressure.will cause the oil spray to dash through by-pass 15 and into thecylinder -1 as the piston 2 completes its return stroke, as shown in thedrawing. This oil spray mixes with the ammonia gas and-isforcedtherewith into .the condenser tank 6 where it is collected by anoiI'sep-ara- .tor inthe bottom of the tank. By means of pipe 16,controlled by valve 17, th'e. oil thus collected is redrawn into thecrank case 13 ..to be againused. The sight feed glass 18 reveals theamount and character of voil within the crank case 13;

It-is to be observed that instantly after the pressure within the crankcase 13 is reduced below the pressure within the suction chamber of thecylinder, there is created a back-suction through the by-pass 15 intothe crank case. This back-suction removes any oil that may have settledon the lower head of the piston 2 from the ammonia gas while within thesuction chamber and deposits it within the crank case 13, thus care ofan attendantoperator.

keeping a working supply of oil therein in addition to the oil returnedthereto from the condenser 6. Another improvement to be observed is inthe outlet valve 19. This valve is provided with duplex springs. 2-0 and21 to relieve the strain on the cylinder head 22 and prevent breaking itout.

It will be observed the upper part of the compressor cylinder issurrounded by a water jacket 23. The water pipe 24 supplies water at thebottom of the condenser tank 6 and passing up through internal pipes tothe top and out through the connecting pipe 25 into the water jacket 23.The outlet valve 26 permits the Water to be changed when desired to keepthe tank 6 and cylinder 1 cool. The pipe extension 27 is designed for apressure gage to be attached thereto to complete the refrigeratingmachine. With the improvements herein described I provide a compressorfor a refrigerating machine that will operate automatically and that maybe run continuously without the The entire invention is so compact thata machine of der, the pressure within said discharging and upper headforming a suction chamber and a discharging chamber Within saidcylincham'ber controlled by a spring actuated alve by pass therefrom tosaid suction chamber, said piston operated by a motor driven crank, saidcrank confined within a lubricating crank case, a by-pass between saidcrank case and saidsuction chamber, the pressure Within said crank casemade by the return stroke of said piston relieved by said by-passdischarging oil spray therefrom into said suction chamber and the liquidoil gathered onthe lower head of said iston drawn therefrom into saidcrank case by the back-suction through said by-pass stantly followingthe discharge of said oil spray from said crank case, as'described and-for the purposes set forth.

WILLIAM YOUNG.

